Thomas carroll



(No Model.)

TQCARROLL.

BIGYGLE.y LOCK.

No. 567,807. Patented Sept. 1 5, 1896.

Il ./1. l 711 I 5.. me un Nrrn rares THOMAS CARROLL, OF DAYTON, OHIO,ASSIGNOR TO SECURITY LOCK AN MANUFACTURING CO., OF SAME PLACE.

BICYCLE-LOCK.

SPECIFICATION forming part of Letters PatentfNo. 567,807, datedSeptember 15, 1896.

Application filed August 8, 1895.

T @ZZ whom it may concern:

Be it known that l, THOMAS CARROLL, of Dayton, county of Montgomery,State of Ohio, have invented a new and useful Improvement inBicycle-Locks; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had 1o to the accompanying drawings, and to the letters ofreference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in bicycle-locks.

The object of the invention is to provide an effective means for lockinga bicycle after the rider has dismounted and to locate said means in amanner to conceal it from view.

Referring to the annexed drawings, upon zo which similar letters ofreference indicate corresponding parts, Figure 1 is a vertical sectionthrough the hub and crank-shaft, showing the interlocking disk in sideelevation. This view is taken on the line w so of Fig. 2. Fig. 2 is afront elevation of the lock mechanism, showing the tubing comprising thehub and saddle-post in section; Fig. 3, detached detail views of one ofthe lock-tum blers; Fig.` 4L, similar views of the lock-bolt. Fig. 5 isa view of the key; Fig.'6, detail detached views of the key-guide. y

The letter A designates the hub-easing, in which the crank-shaft a andthe usual adjunetive devices are inclosed.

B designates the part of the frame usually termed the saddle-post,constructed of tubular metal. lVithin this tube the lock mechanism isplaced, the case Z9 thereof being secured to the interior of the tube inany suitable manner and adjacent to the hub, as shown in the drawings.By thus securing the lock-casing b to the tube B the joint between saidtube and the hub A is reinforced and very materially strengthenedwithout 45 adding any perceptible weight to the bicycle. The interior ofthe case ZJ is provided with an annular iange or bushing b', surroundingthe opening for the key and adapted to form a bearing for the key-guides.

The lock consists of a plurality of tumblers Serial No. 558,613. (Nomodel.)

c, pivotally mounted in the case b by a transverse pivot-pin e. fdesignates the bolt, which, together with said tumblers, is thrown bythe key g, which is inserted in the keyhole g in the usual manner. Theboltf has a vertical slot f', which, in view of the pin e, enables it tobe moved vertically. Each of the tumblers c is provided with a springe', which is securedv against the interior ofthe lock-ease b and presseseach tumbler to the 6e normal position shown in Fig. 2. The pin t' onthe bolt f passes through the slots o in the lower ends of the tumblerswhen said tumblers are thrown in position by turning the key. The bolt foperates in conjunction with a device for locking the crankshaft c. Thisdevice consists of an annular disk C, which is keyed to the crank-shaftwithin the hub A in a central position. The periphery of this disk isprovided with one or more seats or cavities 7o a' on a line with theboltf, and into which the lower end of said bolt may be inserted to lockthe shaft.

Several of the devices comprising the lock mechanism will be recognizedby those skilled in the art as old and well-known features, to wit, thetumblers, bolt, dac. The bolt, however, has a special constructed slotf", one side of which terminates in a cycloidal slot or recess, in whichthe key and guides are sup- 8o ported and the key thereby prevented fromwithdrawal when the bolt is thrown up, thereby obviating the necessityof carrying the key about the person when using the machine.

In other words, the key is maintained in position in the lock when thebicycle is not locked. This is obtained by the key-guide s and key beingin the lower part s of the slot f. Said key is detachable only when themechanism is interlocked. This isavaluable 9o feature of `the invention,as the chance of losing the key is greatly lessened.

While I have shown in the drawings the lock mechanism inclosed in thetube that extends to the saddle, it is obvious that it may be inclosedin any tube that permits of said mechanism being located adjacent to thecranks. The preferred location, however, is that illustrated in theaccompanying drawings. Ioo

Having fully described my invention, I claim as new and desire to secureby Letters Patent- In a bicycle, the combination with a tubularsaddle-post, and a toothed disk rigidly mounted on the crank-shaft in aline with said tubular post, of a sliding locking-bolt constructedessentially in one part having a Vertical slot f the lower terminal ofwhich is enlarged and one side thereof terminates in a cyeloidal slot-or recess which is adapted to support the key when the bolt is thrownup, a series of slotted tumblers pivoted on each side of said bolt, andmeans for actuating the said tumblers and bolt, substantially as and 15for the purposes speeied.

In testimony whereof I have hereunto set my hand this 3d day of August,1895.

THOMAS CARROLL. Vitnesses:

HOWARD ABBOTT, JAMES DALE.

